Network access method and mobile communication terminal

ABSTRACT

A network access method includes logging in to a shared server via a shared account, if a mobile communication terminal detects that a network identification of a public land mobile network (PLMN) of a visited place does not exist in a local memory; searching the shared network information in the shared server online via a network and acquiring the network identification of the PLMN of the visited place from the shared network information, after the shared server is logged in to; adding the network identification of the PLMN of the visited place to an EPLMN list by the mobile communication terminal; and accessing a network according to the EPLMN list.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. Ser. No.15/515,072, filed on Mar. 28, 2017, which is an InternationalApplication No. PCT/CN2016/078077, filed on Mar. 31, 2016, which claimspriority of Chinese Application No. 201510217555.6, filed on Apr. 30,2015. The entire disclosures of the above applications are incorporatedherein by reference.

BACKGROUND Field

The present disclosure relates to a mobile terminal technology field,and more particularly to network access method and a mobilecommunication terminal.

Background

A public land mobile network (PLMN) is a network, which is establishedand operated by a government or an operator authorized by thegovernment, for a purpose of providing land mobile communicationservices for the public. The network is usually interconnected withpublic switched telephone networks to establish a communication networkin a region or a country.

Identification of a PLMN usually includes a series of digital codes. Forinstance, a network identification of a PLMN of the CHINA MOBILE is46000, and a network identification of a PLMN of the CHINA UNICOM is46001. Users can have convenient communications via mobile networksprovided by operators. With the improvement of people's living, userstravel or go on a business trip abroad with mobile communicationterminals are more and more. When the users carry on roamingcommunications (e.g., international roaming communications), theirmobile communication terminals (e.g., mobile phones) need to re-findnetworks to acquire a network identification of a PLMN.

When a mobile communication terminal is moved from a home place to avisited place (e.g., the mobile communication terminal roams from a homecountry to a visited country), the mobile communication terminalrequires accessing to a PLMN of the currently visited place. However,when the mobile communication terminal is moved from the home place tothe visited place, a situation that the mobile communication terminaltakes a long time (sometimes needs to wait for tens of minutes) tosuccessfully access to the PLMN of the currently visited place oftenoccurs. This significantly affects the user's communication experiences.

SUMMARY OF THE DISCLOSURE

Embodiments of the present disclosure are to provide a network accessmethod to solve the technical problem in the prior art. Before a mobilecommunication terminal is turned off or enters an airplane mode, a usercan log in to a shared server via a shared account according toinformation of a visited place, acquire a visited public land mobilenetwork (VPLMN) stored in the shared server, and adds the acquired VPLMNto an EPLMN list. When the mobile communication terminal performs anetwork searching in the visited place by using a registered public landmobile network (RPLMN), because the searched RPLMN is equivalent to theVPLMN, the mobile communication terminal can reside in the cell site andtry to initiate a network registration process, thereby acceleratingspeed of the network searching.

To solve the above problem, in a first aspect in accordance with anembodiment of the present disclosure, a network access method isprovided, including:

Logging in to a shared server via a shared account, if a mobilecommunication terminal detects that a network identification of a PLMNof a visited place does not exist in a local memory, wherein sharednetwork information is stored in the shared server, and the networkidentification of the PLMN of the visited place is a networkidentification of an operator of the visited place, which signs aroaming agreement with an operator of a home place to which a subscriberidentity module attached to the mobile communication terminal belongs;

Searching the shared network information in the shared server online viaa network and acquiring the network identification of the PLMN of thevisited place from the shared network information, after the sharedserver is logged in to;

Adding the network identification of the PLMN of the visited place to anEPLMN list by the mobile communication terminal, wherein the EPLMN listincludes the network identification of the PLMN of the home place andthe network identification of the PLMN of the visited place, and thenetwork identification of the PLMN of the visited place is the networkidentification of the operator of the visited place, which signs theroaming agreement with the operator of the home place to which the SIMcard attached to the mobile communication terminal belongs; and

Accessing a network according to the EPLMN list.

In a second aspect in accordance with an embodiment of the presentdisclosure, a mobile communication terminal is provided, including:

A memory configured to store computer readable program codes; and

A processor configured to execute the computer readable program codes toperform the following operations:

Logging in to a shared server via a shared account, if it is detectedthat a network identification of a PLMN of a visited place does notexist in a local memory, wherein shared network information is stored inthe shared server, and the network identification of the PLMN of thevisited place is a network identification of an operator of the visitedplace, which signs a roaming agreement with an operator of a home placeto which a subscriber identity module attached to the mobilecommunication terminal belongs;

Searching the shared network information in the shared server online viaa network and acquiring the network identification of the PLMN of thevisited place from the shared network information, after the sharedserver is logged in to;

Adding the searched network identification of the PLMN of the visitedplace to an EPLMN list, wherein the EPLMN list includes the networkidentification of the PLMN of the home place and the networkidentification of the PLMN of the visited place, and the networkidentification of the PLMN of the visited place is the networkidentification of the operator of the visited place, which signs theroaming agreement with the operator of the home place to which the SIMcard attached to the mobile communication terminal belongs; and

Accessing a network according to the EPLMN list.

In a third aspect in accordance with an embodiment of the presentdisclosure, a computer readable storage medium stored with computerreadable program codes is provided, and the computer readable programcodes are operated in a mobile communication terminal for:

Logging in to a shared server via a shared account, if it is detectedthat a network identification of a PLMN of a visited place does notexist in a local memory, wherein shared network information is stored inthe shared server, and the network identification of the PLMN of thevisited place is a network identification of an operator of the visitedplace, which signs a roaming agreement with an operator of a home placeto which a subscriber identity module attached to the mobilecommunication terminal belongs;

Searching the shared network information in the shared server online viaa network and acquiring the network identification of the PLMN of thevisited place from the shared network information, after the sharedserver is logged in to;

Adding the searched network identification of the PLMN of the visitedplace to an EPLMN list, wherein the EPLMN list includes the networkidentification of the PLMN of the home place and the networkidentification of the PLMN of the visited place, and the networkidentification of the PLMN of the visited place is the networkidentification of the operator of the visited place, which signs theroaming agreement with the operator of the home place to which the SIMcard attached to the mobile communication terminal belongs; and

Accessing a network according to the EPLMN list.

In the technical schemes in accordance with the embodiments of thepresent disclosure, not only a network identification of a home PLMN ofthe mobile communication terminal but also an acquired networkidentification of a PLMN of an operator, which signs a roaming agreementwith an operator of the home PLMN, is added to the EPLMN list. The PLMNsin the ELPMN list in which the network identifications are stored areregarded to be equivalent. As a result, a network of the mobilecommunication terminal can be accessed according to the EPLMN listbecause the network identifications of the PLMNs of operators of thevisited places, which sign a roaming agreement with the operator of thehome PLMN, are stored in the EPLMN list. Accordingly, when the mobilecommunication terminal is moved from a home place to a visited place andperforms a network searching, possibility of matching with any one ofthe PLMNs in the EPLMN list storing the network identifications issignificantly increased during the network searching. A success rate andspeed can be increased when the mobile communication terminal isaccessed to the network of the visited place. This is beneficial toshorten a user's waiting time significantly (in an ideal state, themobile communication terminal may be accessed to the network withinseveral seconds), thereby enhancing the user's communicationexperiences.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe the technical solutions of the embodiments of the presentdisclosure more clearly, the following briefly introduces theaccompanying drawings required for describing the embodiments.Apparently, the accompanying drawings in the following description showonly some embodiments of the present disclosure, and those skilled inthe art may still derive other drawings from these accompanying drawingswithout creative efforts.

FIG. 1 is a schematic flowchart of an implementation manner of a networkaccess method provided by an embodiment of the present disclosure.

FIG. 2 is a schematic diagram of an implementation manner of an EPLMNlist provided by an embodiment of the present disclosure.

FIG. 3 is a schematic flowchart of another implementation manner of anetwork access method provided by an embodiment of the presentdisclosure.

FIG. 4 is an illustrative block diagram of an implementation manner of amobile communication terminal provided by an embodiment of the presentdisclosure.

FIG. 5 is an illustrative block diagram of an implementation manner ofan online searching module provided by an embodiment of the presentdisclosure.

FIG. 6 is an illustrative block diagram of an implementation manner of anetwork access module provided by an embodiment of the presentdisclosure.

FIG. 7 is an illustrative block diagram of another implementation mannerof a mobile communication terminal provided by an embodiment of thepresent disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A clear and complete description of technical solutions provided in theembodiments of the present disclosure will be given below, inconjunction with the accompanying drawings in the embodiments of thepresent disclosure. Apparently, the embodiments described below aremerely a part, but not all, of the embodiments of the presentdisclosure. All of other embodiments, obtained by those skilled in theart based on the embodiments of the present disclosure without anyinventive efforts, fall into the protection scope of the presentdisclosure.

It is noted that the terms used in the embodiments of the presentdisclosure are merely for the purpose of illustrating specificembodiments, and are not intended to limit the present disclosure. Theterms “a”, “said” and “the” of singular forms used in the embodimentsand the appended claims of the present disclosure are also intended toinclude plural forms, unless otherwise specified in the context clearly.It should also be understood that, the term “and/or” used hereinindicates and includes any or all possible combinations of one or moreassociated listed items.

A public land mobile network (PLMN) is a network which is establishedand operated, by a government or an operator authorized by thegovernment, for a purpose of providing land mobile communicationservices for the public. The network is usually interconnected withpublic switched telephone networks (PSTNs) to establish a communicationnetwork in a region or a country. PLMN=MCC+MNC. For instance, networkidentifications of PLMNs of the CHINE MOBILE include 46000, 46002,46007, and 46008. Network identifications of PLMNs of the CHINE UNICOMinclude 46004, 46006, and 46009. A PLMN is a wireless communicationsystem, which is oriented toward the land, e.g., users in transportationor in moving. However, users of mobile and portable internet are moreand more. An ideal PLMN system provides the users of mobile and portableinternet with the same services as a fixed network. This is a particularchallenge in a complicated topographic region because a base station isdifficult to be found and maintained. There are a lot of obstacles inthe urban environment, such as buildings, and various types of radiofrequency will cause radiation of noises and interferences.

A registered PLMN (RPLMN) is a PLMN which is registered before a mobilecommunication terminal is turned off or out of service. In the TSG TP-21meeting in 2003, this parameter is decided to be deleted from a USIM andstored in a memory of the terminal.

An equivalent PLMN (EPLMN) is a PLMN which has status and priorityequivalent to those of a current PLMN selected by the mobilecommunication terminal.

An equivalent home PLMN (EHPLMN) is a local PLMN which has status andpriority equivalent to those of the current PLMN selected by the mobilecommunication terminal. Specifically, each of the EHPLMN and the EPLMNis such as a 158 network which is newly established by the CHINA MOBILE.The PLMN is such as one of existing 135˜139 networks.

A home PLMN (HPLMN) is a home PLMN of a user of the mobile communicationterminal. That is, MCC and MNC included in an IMSI of a USIM card of themobile communication terminal are identical to MCC and MNC of the HPLMN.A user has only one home PLMN.

A visited PLMN (VPLMN) is a PLMN of a place which is visited by the userof the mobile communication terminal. MCC and MNC of the VPLMN are notidentical to MCC and MNC stored in an IMSI of a SIM card. When themobile communication terminal loses its coverage, a VPLMN is selected.

Please refer to FIG. 1, which is a schematic flowchart of animplementation manner of a network access method provided by anembodiment of the present disclosure. The method includes the followingsteps.

In step S102, if a mobile communication terminal detects that a networkidentification of a PLMN of a visited place does not exist in a localmemory of a mobile communication terminal, the mobile communicationterminal logs in to a shared server via a shared account. Shared networkinformation is stored in the shared server. The network identificationof the PLMN of the visited place is a network identification of anoperator of the visited place, which signs a roaming agreement with anoperator of a home place to which a subscriber identity module (SIMcard) attached to the mobile communication terminal belongs. The networkidentification includes a network number.

Specifically, the mobile communication terminal may be a mobile phone.When the user travels or goes on a business trip abroad with the mobilecommunication terminal, a network of the mobile communication terminalenters an international roaming period. The visited place and the homeplace belong to different countries. The home place may be China, andthe visited place may be, e.g., America or Korea. For instance, when theuser travels with the mobile phone from China to America, the home placeis China and the visited place is America. The network of the mobilephone is in an international roaming period. If the mobile communicationterminal detects that the network identification of the PLMN of thevisited place does not exist in the local memory of the mobilecommunication terminal, the mobile communication terminal can log in tothe shared server via the shared account before reaching the visitedplace. The shared network information is stored in the shared server.The shared network information may include but not limited to HPLMN,EPLMN, and VPLMN. The network identification of the PLMN of the visitedplace is the network identification of the operator of the visitedplace, which signs the roaming agreement with the operator of the homeplace to which the subscriber identity module (SIM card) attached to themobile communication terminal belongs. In the embodiment of the presentdisclosure, the network identification may include a network number. Forinstance, the CHINA MOBILE includes four network numbers: 46000, 46002,46007, and 46008. The CHINA UNICOM includes three network numbers:46001, 46006, and 46009.

For instance, if it is detected that the PLMN does not exist in a localmemory of a mobile phone, the mobile phone may log in to the sharedserver via the shared account. The shared network information is storedin the shared server.

In step S104, after logging in to the shared server, the mobilecommunication terminal searches the shared network information stored inthe shared server online via a network and acquires the networkidentification of the PLMN of the visited place from the shared networkinformation.

Specifically, after logging in to the shared server in step S102, themobile communication terminal may search the shared network informationstored in the shared server online via the network and acquires thenetwork identification of the PLMN of the visited place from the sharednetwork information. For instance, after the mobile phone logs in to theshared server via the shared account, the mobile phone may search theshared network information stored in the shared server online via thenetwork. The mobile phone may acquire the VPLMN according to thesearched shared network information.

In step S106, the mobile communication terminal adds the networkidentification of the PLMN of the visited place to an EPLMN list. TheEPLMN list includes the network identification of the PLMN of the homeplace and the network identification of the PLMN of the visited place.The network identification of the PLMN of the visited place is thenetwork identification of the operator of the visited place, which signsthe roaming agreement with the operator of the home place to which theSIM card attached to the mobile communication terminal belongs.

Specifically, the network identification of the VPLMN acquired in stepS104 may be added to the EPLMN list. A schematic diagram of the EPLMNlist is shown in FIG. 2. The EPLMN is a PLMN which has status andpriority equivalent to those of the current PLMN selected by the user ofthe terminal. The EPLMN mainly solves problems of user residence androaming strategy between a shared network and an original network. Anoperator can configure equivalent PLMNs. These networks can implement toshare resources of communication networks. From the point of business,the resources of the communication networks can be shared betweendifferent operators or different PLMNs defined by the same operator. Inthe embodiment of the present disclosure, the network identification mayinclude a network number. For instance, the CHINA MOBILE includes fournetwork numbers: 46000, 46002, 46007, and 46008. The CHINA UNICOMincludes three network numbers: 46001, 46006, and 46009. The EPLMN listmay include the network identification of the HPLMN and the networkidentification of the VPLMN added in advance. Alternatively, the EPLMNlist may include the network identification of the EHPLMN and thenetwork identification of the VPLMN added in advance. Alternatively, theEPLMN list may include the network identification of the HPLMN, thenetwork identification of the EHPLMN, and the network identification ofthe VPLMN added in advance. The network identification of the VPLMNadded in advance is equivalent to and has priority the same as an RPLMNwhich is registered before the terminal is turned off or out of service.

In step S108, a network is accessed according to the EPLMN list.

Specifically, when being moved from the home place to the visited place,the mobile communication terminal can receive a turn-on instruction fromthe user or an instruction of closing a current airplane mode. Afterbeing turned on or closing the current airplane mode, the mobilecommunication terminal starts a network searching. The mobilecommunication terminal may carry on the network searching according tothe network identification in the EPLMN list. The mobile communicationterminal scans the network identification of the VPLMN which can acquirebroadcast from a base station. The mobile communication terminal canmatch the network identification of the PLMN acquired from theabove-mentioned scanning with the network identification of the PLMN inthe EPLMN list.

When the searching of the mobile communication terminal shows that thenetwork identification of the VPLMN transmitted by a cell site matcheswith any one of the network identification in the EPLMN list, the mobilecommunication terminal may initiate a network registration and establisha communication connection with the network of the visited place.

Please refer to FIG. 3, which is a schematic flowchart of anotherimplementation manner of a network access method provided by anembodiment of the present disclosure. The method includes the followingsteps.

In step S302, if a mobile communication terminal detects that a networkidentification of a PLMN of a visited place does not exist in a localmemory of the mobile communication terminal, the mobile communicationterminal logs in to a shared server via a shared account. Shared networkinformation is stored in the shared server. The network identificationof the PLMN of the visited place is a network identification of anoperator of the visited place, which signs a roaming agreement with anoperator of a home place to which a SIM card attached to the mobilecommunication terminal belongs. The network identification includes anetwork number.

Specifically, the mobile communication terminal may be a mobile phone.When the user travels or goes on a business trip abroad with the mobilecommunication terminal, a network of the mobile communication terminalenters an international roaming period. The visited place and the homeplace belong to different countries. The home place may be China, andthe visited place may be, e.g., America or Korea. For instance, when theuser travels with the mobile phone from China to America, the home placeis China and the visited place is America. The network of the mobilephone is in an international roaming period. If the mobile communicationterminal detects that the network identification of the PLMN of thevisited place does not exist in the local memory of the mobilecommunication terminal, the mobile communication terminal can log in tothe shared server via the shared account before reaching the visitedplace. The shared network information is stored in the shared server.The shared network information may include but not limited to HPLMN,EPLMN, and VPLMN. The network identification of the PLMN of the visitedplace is the network identification of the operator of the visitedplace, which signs the roaming agreement with the operator of the homeplace to which the subscriber identity module (SIM card) attached to themobile communication terminal belongs. In the embodiment of the presentdisclosure, the network identification may include a network number. Forinstance, the CHINA MOBILE includes four network numbers: 46000, 46002,46007, and 46008. The CHINA UNICOM includes three network numbers:46001, 46006, and 46009.

For instance, if it is detected that the PLMN does not exist in a localmemory of a mobile phone, the mobile phone may log in to the sharedserver via the shared account. The shared network information is storedin the shared server.

In step S304, after the shared account is logged in to, the mobilecommunication terminal searches the shared network information stored inthe shared server online via a network. The shared network informationincludes the network identification of the PLMN of the home place andthe network identification of the PLMN of the visited place. The networkidentification of the PLMN of the home place corresponds to one or moreof PLMNs of visited places.

Specifically, after logging in to the shared server in step S302, themobile communication terminal may search the shared network informationstored in the shared server online via the network. For instance, afterthe mobile phone logs in to the shared server via the shared account,the mobile phone may search the shared network information stored in theshared server online via the network.

In step S306, the network identification of the PLMN of the visitedplace is acquired according to the searched shared network information.

Specifically, the mobile communication terminal can acquire the networkidentification of the PLMN of the visited place according to the sharednetwork information acquired in step S304. For instance, the mobilephone can acquire the VPLMN which signs a roaming agreement with anoperator of the home place of the HPLMN or the EPLMN.

In step S308, the mobile communication terminal adds the networkidentification of the PLMN of the visited place to an EPLMN list. TheEPLMN list includes the network identification of the PLMN of the homeplace and the network identification of the PLMN of the visited place.The network identification of the PLMN of the visited place is thenetwork identification of the operator of the visited place, which signsthe roaming agreement with the operator of the home place to which theSIM card attached to the mobile communication terminal belongs.

Specifically, the network identification of the VPLMN acquired in stepS306 may be added to the EPLMN list. A schematic diagram of the EPLMNlist is shown in FIG. 2. The EPLMN is a PLMN which has status andpriority equivalent to those of the current PLMN selected by the user ofthe terminal. The EPLMN mainly solves problems of user residence androaming strategy between a shared network and an original network. Anoperator can configure equivalent PLMNs. These networks can implement toshare resources of communication networks. From the point of business,the resources of the communication networks can be shared betweendifferent operators or different PLMNs defined by the same operator. Inthe embodiment of the present disclosure, the network identification mayinclude a network number. For instance, the CHINA MOBILE includes fournetwork numbers: 46000, 46002, 46007, and 46008. The CHINA UNICOMincludes three network numbers: 46001, 46006, and 46009. The EPLMN listmay include the network identification of the HPLMN and the networkidentification of the VPLMN added in advance. Alternatively, the EPLMNlist may include the network identification of the EHPLMN and thenetwork identification of the VPLMN added in advance. Alternatively, theEPLMN list may include the network identification of the HPLMN, thenetwork identification of the EHPLMN, and the network identification ofthe VPLMN added in advance. The network identification of the VPLMNadded in advance is equivalent to and has priority the same as an RPLMNwhich is registered before the terminal is turned off or out of service.

In step S310, a network is accessed according to the EPLMN list.

Specifically, when being moved from the home place to the visited place,the mobile communication terminal can receive a turn-on instruction fromthe user or an instruction of closing a current airplane mode. Afterbeing turned on or closing the current airplane mode, the mobilecommunication terminal starts a network searching. The mobilecommunication terminal may carry on the network searching according tothe network identification in the EPLMN list. The mobile communicationterminal scans the network identification of the VPLMN which can acquirebroadcast from a base station. The mobile communication terminal canmatch the network identification of the PLMN acquired from theabove-mentioned scanning with the network identification of the PLMN inthe EPLMN list.

When the searching of the mobile communication terminal shows that thenetwork identification of the VPLMN transmitted by a cell site matcheswith any one of the network identification in the EPLMN list, the mobilecommunication terminal may initiate a network registration and establisha communication connection with the network of the visited place.

Please refer to FIG. 4, which is an illustrative block diagram of animplementation manner of a mobile communication terminal provided by anembodiment of the present disclosure. As shown in FIG. 4, the mobilecommunication terminal 100 includes a login module 1002, an onlinesearching module 1004, an adding module 1006, and a network accessmodule 1008.

The login module 1002 is configured to logs in to a shared server if themobile communication terminal detects that a network identification of aPLMN of a visited place does not exist in a local memory of the mobilecommunication terminal. Shared network information is stored in theshared server. The network identification of the PLMN of the visitedplace is a network identification of an operator of the visited place,which signs a roaming agreement with an operator of a home place towhich a SIM card attached to the mobile communication terminal belongs.The network identification includes a network number.

The online searching module 1004 is configured to search the sharednetwork information stored in the shared server online via a network andacquire the network identification of the PLMN of the visited place fromthe shared network information, after the login module 1002 logs in tothe shared server.

The adding module 1006 is configured to add the network identificationof the PLMN of the visited place searched by the online searching module1004 to an EPLMN list. The EPLMN list includes the networkidentification of a PLMN of a home place and the network identificationof the PLMN of the visited place. The network identification of the PLMNof the visited place is the network identification of the operator ofthe visited place, which signs the roaming agreement with the operatorof the home place to which the SIM card attached to the mobilecommunication terminal belongs.

The network access module 1008 is configured to access a networkaccording to the EPLMN list.

Please refer to FIG. 5, which is an illustrative block diagram of animplementation manner of the online searching module provided by anembodiment of the present disclosure. As shown in FIG. 5, the onlinesearching module 1004 may include a searching unit 10042 and anacquiring unit 10044.

The searching unit 10042 is configured to search the shared networkinformation online via a network, after the login module 1002 performsthe login of the shared account. The shared network information includesthe network identification of the PLMN of the home place and the networkidentification of the PLMN of the visited place. The networkidentification of the PLMN of the home place corresponds to one or moreof PLMNs of visited places.

The acquiring unit 10044 is configured to acquire the networkidentification of the PLMN of the visited place according to thesearched shared network information.

Please refer to FIG. 6, which is an illustrative block diagram of animplementation manner of the network access module provided by anembodiment of the present disclosure. As shown in FIG. 6, the networkaccess module 1008 may include a searching unit 10082 and a networkingunit 10084.

The searching unit 10082 is configured to search the network in thevisited place.

The networking unit 10084 is configured to establish, if the PLMN of thevisited place matching with the network identification in the EPLMN listis searched in the visited place by the searching unit 10082, acommunication connection between the mobile communication terminal andthe matching PLMN of the visited place.

Further, please refer to FIG. 7. FIG. 7 is an illustrative block diagramof another implementation manner of a mobile communication terminalprovided by an embodiment of the present disclosure. As shown in FIG. 7,the network access module 200 may include a transmitting device 2001, atleast one communication bus 2002, at least one processor 2003 (e.g., atleast one CPU), a receiving device 2004, a memory 2005, and at least onenetwork interface 2006. The communication bus 2002 is configured toimplement connections and communications among these components. Thenetwork interface may optionally include a standard wireless interface,e.g., a WIFI interface, a BLUETOOTH interface, or an infrared interface.The memory 2005 may be a high-speed RAM or may be a non-volatile memory,e.g., at least one magnetic disk memory. Optionally, the memory 2005 maybe a storing system away from the above-mentioned processor 2003. Thememory 2005 serving as a computer storage medium may include anoperating system, a network communication module, a user interfacemodule, and a network access program.

In the network access device 200 in FIG. 7, the network interface 2006is mainly configured to connect to a shared server and perform datacommunication with the shared server. The processor 2003 may beconfigured to call the network access program stored in the memory 2005and perform the following operations.

If it is detected that a network identification of a PLMN of a visitedplace does not exist in a local memory of a mobile communicationterminal, the mobile communication terminal logs in to a shared servervia a shared account. Shared network information is stored in the sharedserver. The network identification of the PLMN of the visited place is anetwork identification of an operator of the visited place, which signsa roaming agreement with an operator of a home place to which a SIM cardattached to the mobile communication terminal belongs. The networkidentification includes a network number.

After the shared server is logged in to, the shared network informationin the shared server is searched online via a network and the networkidentification of the PLMN of the visited place is acquired from theshared network information.

The network identification of the PLMN of the visited place is added toan EPLMN list. The EPLMN list includes the network identification of thePLMN of the home place and the network identification of the PLMN of thevisited place. The network identification of the PLMN of the visitedplace is the network identification of the operator of the visitedplace, which signs the roaming agreement with the operator of the homeplace to which the SIM card attached to the mobile communicationterminal belongs.

A network is accessed according to the EPLMN list.

Further, the searching the shared network information in the sharedserver online via the network and acquiring the network identificationof the PLMN of the visited place from the shared network informationspecifically include the following operations.

After the shared account is logged in to, the shared network informationis searched online via the network. For instance, after the mobile phonelogs in to the shared server via the shared account, the mobile phonemay search the shared network information stored in the shared serveronline via the network. The shared network information includes thenetwork identification of the PLMN of the home place and the networkidentification of the PLMN of the visited place. The networkidentification of the PLMN of the home place corresponds to one or moreof PLMNs of visited places.

The network identification of the PLMN of the visited place is acquiredaccording to the searched shared network information.

Further, the accessing the network according to the EPLMN list includesthe following operations.

The network is searched in the visited place.

If the PLMN of the visited place matching with the networkidentification in the EPLMN list is searched in the visited place by thesearching unit 10082, a communication connection is established betweenthe mobile communication terminal and the matching PLMN of the visitedplace.

Further, the network identification of the PLMN of the visited place isequivalent to a network identification of a registered PLMN which themobile communication terminal searches firstly.

Further, the visited place and the home place belong to differentcountries or different administrative regions.

It can be understood that the embodiments of FIG. 4 to FIG. 7 may bereferred to the embodiments of the network access method of FIG. 1 toFIG. 3 and not repeated herein.

In summary, a network access method and a mobile communication terminalare provided by implementing the embodiments of the present disclosure.Not only a network identification of a home PLMN of the mobilecommunication terminal but also an acquired network identification of aPLMN of an operator, which signs a roaming agreement with an operator ofthe home PLMN, is added to the EPLMN list. The PLMNs in the ELPMN listin which the network identifications are stored are regarded to beequivalent. As a result, a network of the mobile communication terminalcan be accessed according to the EPLMN list because the networkidentifications of the PLMNs of operators of the visited places, whichsign a roaming agreement with the operator of the home PLMN, are storedin the EPLMN list. Accordingly, when the mobile communication terminalis moved from a home place to a visited place and performs a networksearching, possibility of matching with any one of the PLMNs in theEPLMN list storing the network identifications is significantlyincreased during the network searching. A success rate and speed can beincreased when the mobile communication terminal is accessed to thenetwork of the visited place. This is beneficial to shorten a user'swaiting time significantly (in an ideal state, the mobile communicationterminal may be accessed to the network within several seconds), therebyenhancing the user's communication experiences.

It should be noted that those skilled in the art may understand all orsome of the processes in the methods of the embodiments described abovecan be realized by using computer programs to instruct correspondinghardware. The programs may be stored in a computer readable storagemedium. When the programs are executed, the processes in the methods ofthe above embodiments may be performed. The storage medium may be disk,compact disc (CD), read-only memory (ROM), random access memory (RAM) orthe like.

The above description is merely the specific embodiments of the presentdisclosure, but the protection scope of the present disclosure is notlimited thereto, any skilled who is familiar with this art could readilyconceive variations or substitutions within the disclosed technicalscope disclosed by the present disclosure, and these variations orsubstitutions shall be encompassed in the protection scope of thepresent disclosure. Thus, the protection scope of the present disclosureshall be subjected to the protection scope of the claims.

What is claimed is:
 1. A network access method, comprising: logging into a shared server via a shared account if a mobile communicationterminal detects that a network identification of a public land mobilenetwork (PLMN) of a visited place does not exist in a local memory,wherein shared network information is stored in the shared server, andthe network identification of the PLMN of the visited place is a networkidentification of a PLMN of an operator of the visited place, whichsigns a roaming agreement with an operator of a home place to which asubscriber identity module attached to the mobile communication terminalbelongs; searching the shared network information in the shared serveronline via a network and acquiring the network identification of thePLMN of the visited place from the shared network information, after theshared server is logged in to; adding the network identification of thePLMN of the visited place to an equivalent PLMN (EPLMN) list by themobile communication terminal, wherein the EPLMN list comprises anetwork identification of a PLMN of the home place and the networkidentification of the PLMN of the visited place; and accessing a networkaccording to the EPLMN list, wherein the accessing the network accordingto the EPLMN list comprises: searching the network in the visited placeby the mobile communication terminal which is moved to the visitedplace; and establishing, if the PLMN of the visited place matching withthe network identification in the EPLMN list is searched in the visitedplace, a communication connection between the mobile communicationterminal and the matching PLMN of the visited place.
 2. The method ofclaim 1, wherein the searching the shared network information in theshared server online via the network and acquiring the networkidentification of the PLMN of the visited place from the shared networkinformation specifically comprises: searching the shared networkinformation online via the network, after the shared account is loggedin to, wherein the shared network information comprises the networkidentification of the PLMN of the home place and the networkidentification of the PLMN of the visited place, and the networkidentification of the PLMN of the home place corresponds to one or moreof PLMNs of visited places; and acquiring the network identification ofthe PLMN of the visited place according to the searched shared networkinformation.
 3. The method of claim 1, wherein the visited place and thehome place belong to different countries or different administrativeregions.
 4. A mobile communication terminal, comprising: a login moduleconfigured to log in to a shared server via a shared account if it isdetected that a network identification of a public land mobile network(PLMN) of a visited place does not exist in a local memory, whereinshared network information is stored in the shared server, and thenetwork identification of the PLMN of the visited place is a networkidentification of a PLMN of an operator of the visited place, whichsigns a roaming agreement with an operator of a home place to which asubscriber identity module attached to the mobile communication terminalbelongs; an online searching module configured to search the sharednetwork information in the shared server online via a network andacquiring the network identification of the PLMN of the visited placefrom the shared network information, after the login module logs in tothe shared server; an adding module configured to add the networkidentification of the PLMN of the visited place searched by the onlinesearching module to an equivalent (EPLMN) list, wherein the EPLMN listcomprises a network identification of a PLMN of the home place and thenetwork identification of the PLMN of the visited place; and a networkaccess module configured to access a network according to the EPLMNlist, wherein the network access module comprises: a searching unitconfigured to search the network in the visited place; and a networkingunit configured to establish, if the PLMN of the visited place matchingwith the network identification in the EPLMN list is searched in thevisited place, a communication connection between the mobilecommunication terminal and the matching PLMN of the visited place. 5.The mobile communication terminal of claim 4, wherein the onlinesearching module specifically comprises: a searching unit configured tosearch the shared network information online via the network, after themobile communication terminal logs in to the shared account, wherein theshared network information comprises the network identification of thePLMN of the home place and the network identification of the PLMN of thevisited place, and the network identification of the PLMN of the homeplace corresponds to one or more of PLMNs of visited places; and anacquiring unit configured to acquire the network identification of thePLMN of the visited place according to the shared network informationsearched by the searching unit.
 6. The mobile communication terminal ofclaim 4, wherein the visited place and the home place belong todifferent countries or different administrative regions.